add uWSGI support

[cayaraa]

With the following added to server.yp:

9a10
> import bottle
335a337,339
> # Run bottle in application mode. Required in order to get the application working with uWSGI!
> else:
>     app = application = bottle.default_app()

and a uwsgi ini config file simpler to this:
$ cat /etc/uwsgi.d/web-asset.ini

[uwsgi]
socket = 127.0.0.1:8080
protocol = http
plugins = python
chdir = /opt/web-asset-server/
wsgi-file = server.py
processes = 4
threads = 2
logto = /var/log/specify_web_asset.log

The bottle app code was taken from:
https://community.runabove.com/kb/en/development/how-to-run-bottle-uwsgi-nginx.html

[benanhalt]

Thanks for figuring this out. I will add it to the codebase when I have a chance.